The Albion midfielder has been named in the squad to face Switzerland and Ghana in friendlies.
Head coach Julian Nagelsmann said he expects few, if any, changes now ahead of the summer tournament.
Gross last played for his country when they beat Northern Ireland in September.
He was left out of squads named for games in October and November.
But a return to the Premier League at the turn of the year appears to have propelled him back into the national set-up.
He has been a regular in the Albion midfield, albeit playing different roles, under the guidance of Fabian Hurzeler and has started the last 12 games.
Nagelsmann said: "If everyone is fit, that’s pretty much set in stone. We won’t be experimenting any more.
"With a certain core group, we no longer pay attention to their form on the day.
“We don’t react to every little dip unless it lasts six weeks.
“The crux of the tournament is this - 14 or 15 players get 95 per cent of the playing time, the others get a few minutes – but that role must be filled with maximum commitment."
Former Seagulls striker Deniz Undav has also earned a recall as he enjoys an impressive season with Stuttgart.
Undav has 16 goals and four assists in the Bundesliga this season and is behind only Harry Kane in the scorers’ chart.
Nagelsmann has also brought back Arsenal striker Kai Havertz.
Said El-Mala, the Cologne attacking player who is being strongly linked with a summer move to Albion, remains with the under-21s despite speculation he would receive a first senior call.
The latest selection also appears to indicate Albion midfielder Brajan Gruda, now on loan at Leipzig, is unlikely to go to the World Cup.