GPEX Wallet Swaps only offers swaps for tokens that provide liquidity on the underlying Decentralized Exchanges (DEXs), and that liquidity has to be more than a few thousand dollars' worth (to mitigate price impact). Once liquidity is provided, it will be available.
The message you see suggests that there is no liquidity available for the token you want to swap.
You can always check coingecko.com, search for your token, then click the Markets tab to see where you could swap this token and where it can be traded.