The Diatone Roma F5 DJI V2 frame kit comes with an included GPS and Immortal Antenna holder which is very nice quality and does a great job, provided you have the correct GPS (I think a BN220 fits it, can't remember exactly), but if for any reason you decide to use a Mateksys M8Q-5883 GPS, it's a very tight and bad fit.
Since I like the original design, I basically copied it as much as a could, making it slightly longer with less angle on the GPS. It also has two notches around the GPS to view the status LEDs on the unit. Also, instead of Roma embossed on the back, it says STRIKING FPV, hehe. Aside from these differences, everything else is more or less the same.
One thing of note, because of the way the M8Q is designed (in that one of the ports has no connectivity) the M8Q will have to be oriented backwards so the working JST port is front facing with the LEDs aft. When configuring the magnetometer in your flight controller, you'll have to rotate it 180 degrees to compensate.