G-UNI is an ERC20 wrapper on any Uniswap V3 position with a specified price range (in the case of the stablecoin pairs relevant here, the ranges are fixed and immutable).
Pairs to be onboarded as collateral: G-UNI DAI/USDC G-UNI USDC/USDT G-UNI DAI/USDT
These fungible tokens allow Uniswap V3 liquidity to function as collateral in lending and borrowing markets like Aave. Read full proposal here: https://governance.aave.com/t/arc-add-gelato-s-g-uni-erc20-uniswap-v3-positions-as-collateral-to-aave-s-amm-market/5687