The Major Arcana Tarot Card allocated to the sign of Pisces is the Lovers card. The general meaning of this card is unions, partnerships, love, attractions, connections of opposites, polarities, the relationship between the subconscious, consciousness and super-consciousness.
The Minor Arcana Cards of the Eight, Nine and Ten of Swords have less obvious connections to the sign of Gemini. To begin with, each Suit corresponds to an element, and the Suit of Air corresponds to the element of Air, the intellectual plane. Since Gemini is an Air sign, it corresponding minor cards will be found in the Suit of Swords.
When a Decan Wheel is consulted (see image below), the first Decan of Gemini is found to correspond to the Eight of Swords, Lord of Shortened Force (May 21 - May 30.) The second Decan corresponds to the Nine of Swords, Lord of Despair and Cruelty (June 1 - 10). And the third Decan corresponds to the Ten of Swords, Lord of Ruin (June 11 - 20). If your Sun sign is Gemini, you can determine which minor card is “your” card by seeing where your birthday falls within the Decans, by consulting the chart below. It can be used as an alternate Identifier, or you may contemplate how the card is thematic in your life. Additionally, using the Decan Wheel allows for time to be introduced into readings.
What exactly is a Decan Wheel? A “Decan Wheel” divides a circle, which has 360 degrees, into 36 10-degree segments (“dec” means 10.) Each of these 36 segments correspond to one of the Minor Arcana cards in the Tarot, excluding the Aces and the Court Cards. The 36 segments are grouped into 12 groups of 3. The 12 groups are the Zodiac signs, and the 3 within those groups are the Cardinal (1st decan), Fixed (second decan) and Mutable (third decan) sub-aspects of each sign. So for example if your birthday is October 6, your birthday falls within the approximate 10- day segment of the 2nd decan of Libra. This indicates your birthday is a Fixed sub-aspect (the 2nd decan) of a Cardinal sign (Libra), and corresponds to the 3 of Swords. Reflecting on your particular set of aspect & correspondence will undoubtedly inspire insights about yourself and your life.
Sources:
Tarot Correspondences by T. Susan Chang
Tarot Deciphered by T. Susan Chang & MM Maleen
Qabalistic Tarot by Robert Wang