This is not a word that can be found in standard Tagalog dictionaries.
Please note that gaptol is a word that was made up for there to be an equivalent to the English noun “switch.” In natural conversation, most Filipinos without self-esteem issues simply use the English word as is.
The nearest Tagalog noun is pihitán.
The English word “switch” can be transliterated into Tagalog as iswits (is·wíts).