Gatwick Car Rental questions please on nearest to Nth Term

Am flying into LGW from MCO. Am very familiar with the car rental places in LHR i.e those near the airport versus those not.
Is anyone able to give me any advice on LGW please? Am particularly interested in knowing which ones are closest to North Terminal? Are any of them on site in one of the multi stories or close by?
I don’t wish to spend loads of time waiting with two kids for an irregular minibus that then treks miles to the car rental location in Horley or further away. Thank you
Is anyone able to give me any advice on LGW please? Am particularly interested in knowing which ones are closest to North Terminal? Are any of them on site in one of the multi stories or close by?
I don’t wish to spend loads of time waiting with two kids for an irregular minibus that then treks miles to the car rental location in Horley or further away. Thank you