Hello,
As you mentioned, the GIGADEVICE GD25Q16 is among one of the supported SPI flash for 88MW300.
In the file mw300_qspi.c, you can see a list of “supported” Flash devices in an array "fl_dev_list[]" of structures.
Moreover, looking at the features of both memories GD25Q80 & GD25Q16 and according to the memory map of the 88MW300 there should not be any issue.
Regards,
Estephania