The Swans made a strong score of 273 on day one and completed the job with a good bowling performance.
Regular wickets early meant the away side had Gosnells in trouble at 6-85.
Despite some fight from the hosts, the Swans eventually bowled them out for 214.
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READ NOWBevan Bennell took 3-22, while Keaton Critchell and Jack Baker took two wickets apiece in a promising performance for a young side.
The Swans faced five overs late in the day to finish 0-15 at stumps.
Fifteenth-placed Midland-Guildford host Fremantle at Lilac Hill this Saturday.
n The four-day Futures League game continues into its second day today at Lilac between WA and Queensland.
The WA team is Ashton Turner (c), Jake Carder, Marcus Harris, Nick Hobson, Jaron Morgan, Josh Inglis, Tim Armstrong, Nathan Coulter-Nile, Matt Kelly, Matt Dixon, Kyle Gardiner and Liam O’Connor.
Play starts at 10am.