[4] Copies were packaged with a parental advisory sticker on the front due to the song "Trunk Fulla Amps",[13] which repeats the word "motherfucker" numerous times.

Steve Huey of AllMusic gave the album a rating of 4/5, complimenting its detailed production against cheap toys and Mahaffey's "playful, often kitschy sense of humor".

[15] Spencer Owen of Pitchfork criticized the project's stylistics derivations and the noisiness of "5 Alive" and "Chameleon" while lauding the fun energy presented in other tracks, rating it a 6.9/10.

[3] The album was reviewed more positively by Samuel Barker of RockZone, calling it a "good mix of old style funk with a dose of new age pop" and giving it an A+ grade.

[17] Ryan Peters of Portland Press Herald graded Gizmodgery an A, praising its tasteful mix of contrasting pop elements and Mahaffey's ability to avoid relying on a gimmick.

[2] Mark Woodlief of CMJ shared similar sentiment, admiring Mahaffey's production and comparing his experimental songwriting to Wayne Coyne of the Flaming Lips.

[20] J Noise of Hybrid Magazine equated Mahaffey's guitar work throughout Gizmodgery to Brian May's, admiring the diverse combination of genres and stating a resemblance to Beck's Odelay (1996).

[21] Carlos Ramirez of No Echo was pleased by Mahaffey's choice not to emulate the original singing style of "What a Fool Believes", enjoying its synthetic bouyancy.

[24] Ron Rollins of Dayton Daily News praised the album's energy and quirk,[25] while Ben Wener of The Orange County Register complimented its craftiness and use of childhood imagery.