Ellen's power was, by all accounts, impressive. From behind the block of cement Gamora could at least attest to that before she jumped to push one of the fighters off of one of the gunners' trajectories. When the wail of terror sounded, Gamora looked towards it to find... a portal? Someone had the power of portals. Good.
She didn't care whether the gunmen lived or died, at this point, but there were a lot of superpowered people going down effectively and that did not sit well with her. Sadly, her powers involved full body contact, which involved getting in the way. "Okay I'm going in. If they shoot me, there's a chance either I short out and die on the spot or my redundant systems keep me around long enough to be saved. How many left?"
With that said, Gamora started running towards the gunmen shooting in tandem, coming at them sideways. She took their heads in each hand and knocked them together; then again, then once more. The longer this went the angrier she got, until eventually the men dropped their guns and fell onto a pile over each other. Head trauma seemed to be her superpower.