Quick Answer
To trade Ethereum tokens on GDEX Pro, sign in with a Google or Apple account, deposit ETH or buy it with Apple Pay, select Ethereum mainnet in the network selector, and swap into any ERC-20 token for an approximately 1% swap fee. GDEX Pro is a self-custody, multi-chain trading terminal (not a DEX or a centralized exchange) covering the nine highlighted networks including Ethereum, Base, and Arbitrum, so if a token is also available on an L2, you can skip Ethereum's higher gas costs entirely. Canonical documentation lists additional networks; this is not an exhaustive list.
Ethereum mainnet is where most ERC-20 tokens launch and where liquidity is often deepest, but it's also the most expensive of the nine highlighted networks GDEX Pro supports to transact on. Every swap, approval, and transfer on Ethereum pays gas priced in ETH, and that gas can range from a few dollars to well over $50 during network congestion — independent of GDEX's own ~1% swap fee. Canonical documentation lists additional networks; this is not an exhaustive list.
GDEX Pro is a self-custody, multi-chain trading terminal and swap aggregator, not a decentralized exchange and not a centralized exchange. You sign in with a Google or Apple account through Web3Auth threshold cryptography, there's no seed phrase to write down, and your private key remains exportable at any time. It works directly in a browser, including mobile Safari, with no app to install.
This guide walks through trading an ERC-20 token on Ethereum mainnet step by step, then covers when you're better off trading the same token on Base or Arbitrum instead, where GDEX Pro's swap fee stays the same but network gas is dramatically lower.
How GDEX Pro Compares
GDEX Pro vs. other Solana/multi-chain trading terminals
| Spec | GDEX Pro | BullX / Photon / Axiom | Trojan / GMGN |
|---|---|---|---|
| Chains supported | 9 (Solana, Ethereum, Base, BNB, Arbitrum, Optimism, Sui, Sonic, Berachain) | Verify current vendor documentation | Verify current vendor documentation |
| Ethereum mainnet support | Yes, native network selector | Verify current vendor documentation | Verify current vendor documentation |
| Custody model | Self-custody via Google/Apple sign-in, no seed phrase | Verify current vendor documentation | Verify current vendor documentation |
| Swap fee | ~1% | Verify current vendor documentation | Verify current vendor documentation |
| Fiat on-ramp | Apple Pay, $50 min, signup-to-trade without KYC No KYC is required for GDEX signup-to-trade. Third-party on-ramp providers may require identity verification and apply eligibility restrictions. | Verify current vendor documentation | Verify current vendor documentation |
| Perpetuals | Via HyperLiquid | Verify current vendor documentation | Verify current vendor documentation |
| AI copy-trading | up to 6 AI agent wallets with risk presets | Verify current vendor documentation | Verify current vendor documentation |
Step-by-Step Guide
Sign in to GDEX Pro
Go to gdex.pro in any browser, including mobile Safari, and sign in with your Google or Apple account. This creates a self-custody wallet via Web3Auth threshold cryptography — no seed phrase, and your private key is exportable if you want to hold a backup.
Fund your wallet with ETH
Deposit ETH from an external wallet or exchange, or use the built-in Apple Pay on-ramp to buy ETH directly with a $50 minimum purchase and signup-to-trade without KYC (roughly 2-3% on-ramp fee applies). No KYC is required for GDEX signup-to-trade. Third-party on-ramp providers may require identity verification and apply eligibility restrictions.
Select Ethereum as your network
In the network selector, choose Ethereum mainnet. GDEX Pro supports the nine highlighted networks total (Solana, Ethereum, Base, BNB, Arbitrum, Optimism, Sui, Sonic, Berachain), so confirm you're on Ethereum before entering a contract address. Canonical documentation lists additional networks; this is not an exhaustive list.
Enter the ERC-20 token you want to trade
Paste the token's contract address or search by name to pull up the swap screen, and double-check the contract address against a trusted source before confirming — this is your main defense against fake tokens.
Review the swap details and confirm
Check the output amount, price impact, and estimated network gas fee, which on Ethereum mainnet is typically the highest of GDEX Pro's 9 supported chains. GDEX Pro's own swap fee is an approximately 1% on top of whatever gas the Ethereum network charges.
Confirm and monitor the transaction
Approve the swap and wait for on-chain confirmation. Once confirmed, the token appears in your GDEX Pro portfolio view, where you can track it or route it into a copy-trading agent slot if you want automated management going forward.
Why Ethereum gas changes the math
GDEX Pro charges the same ~1% swap fee regardless of which of its the nine highlighted networks you trade on. What changes is the underlying network gas, and Ethereum mainnet consistently carries the highest gas of any chain GDEX Pro supports. Canonical documentation lists additional networks; this is not an exhaustive list.
A swap that costs a few cents in gas on Base or Arbitrum can cost several dollars — sometimes tens of dollars during congestion — on Ethereum mainnet for the exact same token pair, if that token is bridged or also deployed on the L2. For smaller trade sizes, gas can outweigh the swap fee itself.
- Check whether your target ERC-20 token is also deployed on Base or Arbitrum before committing to a mainnet trade
- Small trades (under roughly $200-300) are hit hardest by mainnet gas as a percentage of trade size
- Larger trades absorb fixed gas costs more easily, making mainnet gas less of a factor proportionally
When to use an L2 instead of Ethereum mainnet
If the ERC-20 token you want is natively issued on Ethereum only, mainnet is your only option and the gas cost is unavoidable. But many popular tokens and their liquidity now also exist on Base or Arbitrum, both of which GDEX Pro supports through the same network selector and sign-in.
Review the current route, complete quote, order conditions and feature availability. This guide does not establish a cost or execution advantage over alternatives. Orders can fail or remain unfilled, and trading can lose money.
Fees and risks to understand before trading
Wallet access uses user-controlled, exportable keys as described in the wallet documentation. Agent execution is separately documented as using server-side managed wallets. Check the custody model and permissions of the feature you are using before allocating funds.
Always verify a contract address before swapping — copy it from an official source, not a search result or unsolicited link. Ethereum mainnet transactions are irreversible once confirmed, and high gas periods can cause a pending transaction to fail and still consume some gas.
- signup-to-trade without KYC is required to trade or on-ramp, which also means no recovery process if you lose access to your Google/Apple sign-in and haven't exported your private key No KYC is required for GDEX signup-to-trade. Third-party on-ramp providers may require identity verification and apply eligibility restrictions.
- Price impact and slippage can be higher on thinly traded ERC-20 tokens; review the quoted output before confirming
- This is not investment advice, and no swap fee structure or feature guarantees a profitable trade
Frequently Asked Questions
How do I trade Ethereum tokens on GDEX Pro?
Sign in with Google or Apple, fund your wallet with ETH (or buy it via the $50-minimum Apple Pay on-ramp), select Ethereum mainnet in the network selector, enter the ERC-20 token's contract address, and confirm the swap for a ~1% fee plus network gas.
Is GDEX Pro a decentralized exchange?
No. GDEX Pro is a self-custody, multi-chain trading terminal and swap aggregator that routes trades across the nine highlighted networks, including Ethereum. It is not a DEX itself and not a centralized exchange. Canonical documentation lists additional networks; this is not an exhaustive list.
Why is gas so expensive when trading on Ethereum mainnet?
Ethereum mainnet gas is priced by network demand and is consistently the highest among GDEX Pro's 9 supported chains. GDEX Pro's own ~1% swap fee doesn't change, but the underlying Ethereum network fee can range from a few dollars to much more during congestion.
Should I trade on Ethereum or an L2 like Base or Arbitrum?
30% of GDEX's net trading fee from direct referrals and 10% from their referrals, no cap. Earnings depend on referral activity and aren't guaranteed.
Do I need KYC to trade Ethereum tokens on GDEX Pro?
No. GDEX Pro requires signup-to-trade without KYC to trade or to use the Apple Pay fiat on-ramp, which has a $50 minimum purchase and roughly a 2-3% fee. No KYC is required for GDEX signup-to-trade. Third-party on-ramp providers may require identity verification and apply eligibility restrictions.
Do I need a seed phrase to use GDEX Pro?
No. GDEX Pro uses Web3Auth threshold cryptography, so you sign in with a Google or Apple account instead of managing a seed phrase, and your private key remains exportable if you want a manual backup.
Can I trade Ethereum perpetuals on GDEX Pro?
GDEX Pro offers perpetuals trading through an integration with HyperLiquid, separate from its spot ERC-20 swap functionality on Ethereum mainnet.
Is GDEX Pro safe for trading ERC-20 tokens?
Wallet access uses user-controlled, exportable keys as described in the wallet documentation. Agent execution is separately documented as using server-side managed wallets. Check the custody model and permissions of the feature you are using before allocating funds.
Bottom Line
GDEX Pro is a solid choice for trading Ethereum ERC-20 tokens when you need mainnet-specific liquidity, thanks to its self-custody sign-in, approximately 1% swap fee, and signup-to-trade without KYC Apple Pay on-ramp. But Ethereum mainnet gas is the highest of its 9 supported chains, so for any token also available on Base or Arbitrum, switching networks in the same GDEX Pro account is the more cost-efficient move. No KYC is required for GDEX signup-to-trade. Third-party on-ramp providers may require identity verification and apply eligibility restrictions.
Self-custody. $50 minimum. No KYC.