The 22-year-old returned to Uruguay this week after the passing away of a family member.
But the Saints boss has allayed fears the 22-year-old could miss the match with the Royals as he will arrive back in England on Friday morning.
"Gaston went back to Uruguay last Sunday for compassionate reasons," said Adkins.
"He is back on the training ground tomorrow morning so we will have a good chat with him then.
"He has done a bit of training over in Uruguay so that is beneficial and I am sure he will be desperately wanting to play at the weekend.
"We'll have a good chat with him in the morning about how he is feeling but, knowing Gaston, he'll want to play."
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