While Gambit Gaming's former teammate "D4rker" will be assisting the team in Dreamhack, there's no mention of him staying with the team after Dreamhack ends.

After Edward has made the shocking move from Gambit Gaming over to North American team "Curse Gaming", The team has picked up "D4rker", a former teammate for the team back in their "Moscow 5" era. While he will be accompanying them for the first week of LCS at Dreamhack, there are no claims that he will stick with the team afterwords. Here's a quote directly from the statement after Edward departed from the team:

“ With only eleven days left until the start of LCS EU Summer, we have begun to search for candidates for a vacant support role. As of now we haven't signed a new player, but we have started practicing with Andrey "Darker" Plechistov. Should we manage to prepare his visa in time, he is going to represent us at LCS EU DreamHack - the first stop of LCS EU Summer, taking place in Sweden from 15th to 17th of June. ” With only eleven days left until the start of LCS EU Summer, we have begun to search for candidates for a vacant support role. As of now we haven't signed a new player, but we have started practicing with Andrey "Darker" Plechistov. Should we manage to prepare his visa in time, he is going to represent us at LCS EU DreamHack - the first stop of LCS EU Summer, taking place in Sweden from 15th to 17th of June.

We've also received word from an unnamed source that he is not confirmed as a fifth, even though that is what is listed from LoleSports. The future of Gambit Gaming's roster as a full entity is still uncertain.