https://lh3.googleusercontent.com/-C...no/WjZ14zO.jpg

What.

I mean, would be possible another sentai could follow concepts from Gaoranger and Gingaman mechas ?

As in? We've had several Arm-Swapper giant robots already.

Living creatures becomes mechas.

Yeah lots of them are.

Abaranger was living mecha, Magiranger was all living mecha outside of Travelion, Gekiranger was arguably living mecha (or at least mecha made out of magic beast life energy), Go-Onger's Engines literally had Souls, Origami in Shinkenger were alive, Datas, GoseiKnight, the Abare Headder and Mystic Brothers were all arguably alive, Buddyroids are also arguably alive being that they are sapient robots, the Zyudenryu were all alive, and we had plenty of scenes showing that Cube Animals were living beings too.

This is why I don't think you actually watch Sentai.

What if VRVR Master in he's place was suppose to be a sixth member ?

You forgot the mecha from Gingaman.

I like Gingaman and Gaoranger mechas, they're pretty cool actually.

VRV Master was, in no way, shape, or form, a sixth ranger. If you squinted your eyes a bit, you could argue that he's kind of a mentor of some kind but that's because... well, they're Carranger. He gives them their mecha and a bit of advice but that's really it as far leadership is concerned. I don't see why Power Rangers made him a ranger outside of his appearance. He didn't even have that many fight scenes.

And Gaoranger because Sevenlima started off with those as and example of living mecha. No need to mention it, really.