The Canadian and her stallion made a return to the winner's circle in the Grand Prix Special; Gallagher and Come Back de Massa 2nd in 4* Freestyle.
The Olympic champion rode the mare Just Be Gentle to win Thursday's feature event at World Equestrian Center – Ocala.
The Canadian swept the Grand Prix division at World Equestrian Center – Ocala January CDI3* Show riding her Come Back de Massa.
The WEC Grand Arena was the scene for a contest between 12 nations; Canadian Tiffany Foster placed sixth riding Electrique.
The 17-year-old from Burlington rode her own Toucare KDW Z to one of just two double-clear rounds to win the 1.45m event on Sunday.
The pair won the $200,000 UF Health Grand Prix CSI4* in a three-horse jumpoff – the US rider's third international victory in two weeks.
The Canadian rode the 10-year-old Belgian Warmblood owned by his mom Lesley Martin to the win in their first FEI week together at WEC-Ocala.
The Canadian and her longtime partner scored 70.723%, Chris von Martels and Eclips place second during May Dressage CDI3*.
It's a personal best for Ariana Chia and Guateque IV, while Naima Moreira Laliberte and Statesman take the Special qualifier.
The highlight class of the week on a chilly Florida night at WEC-Ocala saw the US 'Master of Faster' top a four-horse jump-off.