These taxes on timeshare in Hawaii are called TAT and TSO. There is also GET, but that only applies to rentals. As a guest staying on a timeshare based stay, they would pay TSO. TSO is calculated as a percentage of 50% of the maintenance fee for the unit they are staying in. This is older information, so the percentage has changed from the 10.25%, but otherwise the calculation is the same.
https://files.hawaii.gov/tax/legal/brochures/TAT_brochure.pdf
https://files.hawaii.gov/tax/legal/brochures/TAT_brochure.pdf