I don't think there is a way to predict the repeating digit. Here is a recent Trend Analysis I did on Georgia Midday. I have added the position of the repeated digit in red for you. By the way, IF you could determine just one number in the winning number, you could guarantee a box win by playing 55 tickets. Good Luck!
Tue, Jun 14, 2005 5-7-6 E/H */* 2
Mon, Jun 13, 2005 3-7-6 E/H -/- 0
Sat, Jun 11, 2005 2-9-2 O/L -/- 0 D (1)
Fri, Jun 10, 2005 5-7-0 E/H -/* 1 [1/3]
Thu, Jun 09, 2005 5-3-5 O/H -/* 0 D (0)
Wed, Jun 08, 2005 8-6-8 E/H -/- 0 D (3)
Tue, Jun 07, 2005 2-0-3 O/L -/- 0
Mon, Jun 06, 2005 8-9-1 E/H -/* 2
Sat, Jun 04, 2005 7-9-1 O/H */* 1 [1/2]
Fri, Jun 03, 2005 7-7-5 O/H */* 1 D (0) [3]
Thu, Jun 02, 2005 6-6-7 O/H -/- 0 D (5)
Wed, Jun 01, 2005 0-3-9 E/L -/- 1 [1]
Tue, May 31, 2005 3-7-5 O/H */- 1 [3]
Mon, May 30, 2005 2-4-3 O/L */- 1 [1]
Sat, May 28, 2005 4-9-6 O/H */* 2
Fri, May 27, 2005 8-9-6 O/H */* 0
Thu, May 26, 2005 5-5-7 O/H -/* 1 D (7) [1]
Wed, May 25, 2005 5-8-1 E/H -/- 2
Tue, May 24, 2005 3-1-5 O/L -/* 1 [3]
Mon, May 23, 2005 2-9-1 E/L */* 0
Sat, May 21, 2005 3-4-5 E/L */* 1 [1]
Fri, May 20, 2005 4-2-6 E/L */- 1 [3]
Thu, May 19, 2005 7-5-2 E/H -/* 1 [2]
Wed, May 18, 2005 9-2-6 O/H */* 1 [2/3]
Tue, May 17, 2005 1-6-6 O/H -/- 0 D (2)
Mon, May 16, 2005 2-0-4 E/L */- 0
Sat, May 14, 2005 5-6-7 E/H -/* 0
Fri, May 13, 2005 1-8-8 O/H */- 0 D (0)
Thu, May 12, 2005 4-3-3 O/L -/- 0 D
Wed, May 11, 2005 9-2-7 E/H
Odd/Even changed = 16
Odd/Even same = 13
High/Low changed = 14
High/Low same = 15
-/- (Odd/Even changed, High/Low changed) = 9
-/* (Odd/Even changed, High/Low same) = 7
*/* (Odd/Even same, High/Low same) = 8
*/- (Odd/Even same, High/Low changed) = 5
No digits repeated = 13
One digit repeated = 12
Two digits repeated = 4
CONCLUSION:
Play opposite Odd/Even and opposite High/Low as the last draw (this is very close). After a double hits, include doubles in you picks for the next 2 draws. If you need to reduce the number of tickets, then play only those numbers with one digit repeating from the previous draw. But you will notice that the difference is not great.
Georgia Midday is hard to call.