So I set out to add the iflight GPS module to my green hornet today which has the succex-E mini F4. I discovered however the all the 5v pads had been taken by the 500mw VTx, FPV cam, buzzer and crossfire nano. I was concerned that I might breach the 2.5a limit of the BEC but realised there was a spare 3.3v pad. I looked up the input voltage of the chip and its range was intact 3-5v. Anyway I wired it up and onto UART3 and bingo it works. Iceing on cake is that the 3.3v BEC actually powers off USB as well whereas the 5v is from LIPO. Thought I'd share in case anyone else faces same dylema

Decided on this location for GPS chip if anyone else decides to do same.