4 cups chilled pineapple juice
3 cups chilled apricot nectar
2 cups chilled grapefruit juice
1 1/3 cups gin
1 cup chilled tonic water
Stir first 3 ingredients in large pitcher to blend. (Can be prepared 1 day ahead. Cover and refrigerate.) Add gin and tonic water to fruit juices and stir to blend. Fill 8 tall glasses with ice. Pour drink over. Garnish pineapple spears and serve.