There are numerous types of ellipsis that are acknowledged by linguistics. Here are some examples of the various types:
Gapping
(1) Should I call you, or <should> you <call> me?
Stripping
(2) Should I call you, or <should> Bill <call you>>
VP-ellipsis (verb phrase ellipsis)
(3) If I call you, Bill will <call you> too.
Pseudogapping
(4) Bill has been calling me more than he has <been calling> you.
Answer fragments
(5) Who has been calling you? -- Bill <has been calling me>.
Sluicing
(6) Bill is calling me, but I don't know why <he is calling me>.
Null complement anaphora
(6) I am trying to understand this, and you are also trying <to understand this>.
Comparative deletion
(7) He drinks more cola than she drinks <cola>.
N-ellipsis (noun ellipsis)
(8) She took the first train, and he took the second <train>.
The pointy brackets indicate the elided words. These eight do not exhaust the list of ellipsis types, but they are the most widely acknowledged. Note that small clauses are not included in this list. To my knowledge, small clauses are not generally taken to involve ellipsis. Here are some examples of small clauses:
Fred wiped [the table clean].
Susan opened [the window wide].
Larry calls [you a genius].
The square brackets mark the small clauses. They are called "small clauses" because they are indeed small -- they contain just a subject and a predicate -- and because they lack a verb (no verb appears inside the square brackets). They are not generally considered to involve ellipsis because there is no way to acknowledge elided material, e.g.
*Fred wiped [the table to be clean].
*Susan opened [the window to be wide].
*Larry calls [you to be a genius].
To come more directly to the question, gapping and small clauses are distinct phenomena of syntax. Gapping is widely acknowledged as a type of ellipsis, whereas small clauses are not generally taken to involve ellipsis. So the notion that gapping results in a small clause is not accurate. Ellipsis, gapping, and small clauses are discussed in Wikipedia.