On 25 June 2018, Galvaliz signed with Honduran Liga Nacional side Motagua.[2] He made 27 league and seven playoff appearances that season as Motagua won both the Apertura and Clausura.[1] Galvaliz also made seven appearances in CONCACAF League play, scoring one goal and helping Motagua to a runner-up finish.[1]
In the 2019–20 season, Galvaliz made 22 league appearances, scoring three goals, and another four appearances in the Apertura playoffs.[1] He made another seven appearances in CONCACAF League that year, helping Motagua to another runner-up finish and qualification to CONCACAF Champions League.[1]
On 8 May 2020, Galvaliz re-signed with the club for another year.[3]