He added: "I have waited a long time for it and now hopefully I can get my share in the league and help Swansea finish in a better position than last season.
"It was an open goal. But I was still nervous - it's been that long. I know it's not the real thing, not in a league game, but it was a nice feeling and a confidence booster for me.''
Gower scored in the last minute, adding to Guillem Bauza's penalty on the stroke of half-time after Fede Bessone was brought down in the box.
Gower added: "Three of us broke the offside trap and I think Kerry [Morgan] and Jordi [Lopez] got in each others' way. In the end Jordi squared it to me and I rolled it in.
"I think Jordi knew how much it meant to me because I gave him a big kiss afterwards."
Swansea end their Spanish tour on Monday night with a triangular tournament against host club CE Sabadell and Gimnastic.
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